The aim of this study was to evaluate the phytotoxicity of different organic wastes. The germination index (IG), radicle/hypocotyl length of lettuce and the biomass of annual ryegrass were evaluated on a degraded granitic soil (Alfisol). The organic wastes were: Municipal sludge (LM), salmon manure from pisciculture (LPT), and salmon manure from lake-cage farming (LSL). Five doses of these materials (sludge/soil) were prepared: 25, 50, 75, 100 and 1501 ha-1A control without addition was also included. Results indicated that the IG, as well as radicle and hypocotyl length of lettuce was not significantly affected when sludge/soil ratio ranged between 25 to 100 t ha-1. Regarding annual ryegrass all treatments organically amended at dose between 25 and 50 t ha-1 produced significantly (p < 0.05) more aboveground biomass than the control